[Shankenstein]

Alot of GDI work is still being developed. If they found a setup that works, and the performance in cold temps is OK... they probably put that investigation on the back burner, leaving the flexibility built into the code's framework.

How certain are we that the "Total Injection Ratio GDI port" represents the percent of total fuel mass that is sent to the GDI system?

That table could easily be the "Late Injection Ratio" that tells the injector how to split early and late injection. To clarify, many systems use an early injection that will be pre-mixed by piston movement. When the spark ignites it, cylinder temps rise and a late injection pulse can auto-ignite.

Many systems just do 50/50 mass split, but there are times where it's better to run GDI in early injection only mode (when cylinder temps would be too low to auto-ignite).

My question - are there other tables that have been identified, related to early/late injection for the GDI system?

If so, ARGHX's theory about an offset may be correct... or it could just be mislabeled variables.